Jeff wants to use mental math to see if he can afford the computer and printer shown at the right. first he makes a ten by adding 527 +3. what does jeff have to do next?

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of

I’ve been trying all day to figure this puzzle out. i need the work for it aswell. it is a factoring polynomials tarsia. the image is below.

Which of the functions below could have created this graph?